Our government, both state and local, would never survive a full audit. Just the BOE alone would be taken apart and dismantled if the level of missing and misspent funds was ever brought to light.
I bet the record keeping for the pistols is incomplete, and i's easier to lie, saying the guns were 100% destroyed, than try and explain how 20% or more of their inventory is unaccounted for.
THOSE are the guns that will "wind up on our streets!" Whether stolen or simply not accounted for when an officer signs one out, accountability would be shown to have gaps. In this land of strict gun laws, that would be really bad press for our elected and appointed officials.